Superheater boiler



May 24,1927. w. F. KEENANHJR SUPERHEATER BOILER Filed April 17. 1925 2 sheets-sheet 1 INVENTOR BY a p m g TTORNEY Mayl 24, 1927. 1,630,087

w. F. KEENAN. JR

SUPERHEATER BOILER Filed April 41'7. 1925 2 sheets-sheet? l INVENTOR ATTORNEY ooooooooooo oo ooo oooo oooo oo.oo oBWoo .oooo

Patented May 24, 1927.

UNITED siaiss4 WALTER FRANCIS KEENAN, JR., OF PELHAM, NEW YORK, 'ASSEGNOR TO POWER SPE-` CIALTY COMPANY, OF NEW YORK,N; Y., A CORPORATION OF NEW YORK.V

f SUPERHEATER BOILER.

A-ppncnon inea Api-i1 i7, ies.' ,sensi Nq. 23,7133.

The general object of the .present inven? tion is to provide a boiler of" theyertical l. watertube type with. improved steam super-v lieating provisions.

More specirically, the object of the inven-v ltion provide.` an efectivecombinatioll of a superheater with a wasteiheat boiler of i the well known ickestype, whereby a desirably rhigh superheating effect may be 0btained, with aV superheater `which is siinple in construction and arrangement, and is so` disposed as to facilitate inspection andrepairs, and wliich'does not weaken, or tend to produce air leakage through, the boiler shell, or require any change in its cylindrical section.'

The variousf characterize my inventionai'e pointed out with particularity .in the claims annexed to, and Vforming a part of this specification; but y for a better. understanding of the invention, however, its advantages-and specific objects attained with its use, reference should be had to the accompanying drawings and descriptive mailer inwhich I have illustrated and described the best forms of iny invention.

Uf the drawings:

F ig. l is a vertical section on the line 'iw-1 1 ci1 Fig. `3; Fig-Q is an elevation ot' the lower portionof the boiler taken ati-ight angles to Fig. l;

Fig. 3 isa plan section on the line 2P-3 of.

Fig. 4l is a partial section taken siinilarly to F ig. 3, but on a larger scale; y

Fig. 5 is an elevation of a portion of the boiler; and

Figa. i

The drawings show a waste boiler of the well known lVickes type, comprising an upper steain and water drum A, alower water drinn B, and Verticalwater tubes C connecting vsaid druinsand enclosed Within acylindrical boiler shell formedy by an outer metal casing D and a refractory lining d. The heating, gases enter the boiler shell throughvan inlet 1D and pass vout through an outlet ,D2 at thetop of .the intertube space and at opposite sides of a central baille E' which'extends'troni the druni A downward terminating suiliciently far above the bottom eaturesrv novelty whichy Fig. 6- is a section on the line G-Gbt Sonie of the water tubes C are `oniitted to nprovide space ior one or more Verticalvrows or horizontal `superhealer elements F .par-

lallel to and in proximity tothe baffle E,and preferably at tlieiront or high temperature sident the latter. In the particular forni ot construction shown thethird row of' water tubes C in front of the battle replaced by asingle row supei-lieater elements F. The vertical row of elements F extends throughout substantially the entire distancebetween the drums Ay and B. The elements F are.;`

of thepFoster type, comprising` tubes y encased in externally corrugated tubular cast Viron casings. The bare ends or' the tubes extend through the boiler shell yandV havey their ends projecting out Jfrom the casingl ot brackets H secured `to the exterior ofthe boiler lshell D, and which receives steam by ,suitable piijieronnections (not shown) from the ksteain drinn A. The opposite end of,

each tube is connected ,directly to the superheatei outlet header J also supported ina vertical position'by brackets J secured to the boiler shell D. y as provided with a drainage Connection H Atone side of the boiler the boiler yshell is formed with holes just large enough to receive the tubes and the .latter are advanta- Tlie header l-I is shown geously expanded into holes in a reinforcing j plate or pad F2 `secured against -the outer side of the raising7 thus making the Joints tight againstv airr leakage` notwithstanding y the substantial difference in the. pressures within and without the boiler shell which i may amount to .tour or yii've pounds. The ends of the tubes f'may `be rolled or other- Wise secured in the header J.' i

At the opposite side of the boiler openings are foi-ined in the boiler shelllarge enough to perinit the' passage oit the encased portions of the elements F, for removal and replace'- nient if necessary. The portions Z of these openings whichV are vl-orfined inthe refractory portion l of the shell arerectangular and,

`normally contain sil-o-cel or the like packed about the tubes j'. At the outer ends of the holes (Z2 the casing D is formed with a vertical slot- DS, theedges of which are securedT to stifening angle bars D4. `'This slot isy closed by a series 'of plates F5, one lfor each .boiler heating surface.

tube f, each ofthe latter passing Athrough Vand being expanded into the corresponding plate F5. The plates F5 are bolted to the stiffening angles D, and gas tight joints between the plates l`5 and the boiler shell D.

VVith'the described arrangement, it is pos-y sible to obtain a relatively high superheating etl'ect with a relatively lsmall amount of superheatingsurface, 'and the Water tubes omitted to make room for the superheater form' but a.' relatively small portion ot' the The use oli' the invention requires no change in the general designof the boiler. The tightness of the boiler shell is Imaintained ivhile the superheaterl elements may ybe replaced Without great 'dilliculty The Iarrangement of the superlieater :inlet and outlet header rl and J, atopposite'sides of the boiler, permits of very simple and'direct steam pipe connections to the headers.

/Vhil'e in accordance with the provisions of the statutes, I have illustrated and described the best embodiments o't my' inventionnovy known to me, it will be apparent to those skilled in the art that changes may be madein the form ol the apparatus dis* closed Without- .departing from the spirit of my invention as set forth in the appended claims,- and that in some cases certain teatures of my invention may be used to -advantage1 Without a corresponding use of otherleatures:

Having now describedmy invention, what AI claim -as new and desireto 'secure by Letters Patent,is:

l. The combina-tion WithI a boiler coinprising avertical shell and 'vertical Water tubes and a centrally disposed battle' providing up and 'down heating gas passes, 'of a verticalr roW- of horizont-al superheater elements parallel to and alongsidesaid baille and having their ends extendingthrough said shell and vertical-inlet and outlet headers exter-k nal to said shell and 'to Which the opposite endsof Isaid element-s are connected.

2. The combination of claim l, and vin conjunction therewith a superimposedset of vertically'disposed 'plate-like bodies formed with apertures receiving intermediate portions of said superheater element-s which are thereby supported.

3. The combination of claim'f'll, land in conjunction thereivith 'a-superimposed set of vertically disposed plate-like bodiesk formed with apertures receiving Vintermediate portions of said superheater elements which are thereby Supported, said bodies having their ends received between adjacent pairs ol water tubes and being provided with transverse Water tube engaging portions whereby said bodies are held against displacement.

4. The 'combination with a boiler having vertical Water tubes and a vertical enclosing shell comprising an outer metallic casing and an inner refractory lining, ot' a superheater consisting of horizontal tubes extending across the boiler between groups ol water tubes 'and having entl portions passing through the shell at opposite sides ot' the boiler'and'ribbed casings surrounding the portion o't' the tubes Within the shell, the latter being formed With openings at one side large enough to permit the passage ol the encased portions ot the super-heater elements, and sectional metallic plates uniting With the casing to seal said opening and formed vwith apertures through which the corresponding ends of the elements extend and in which they lit tightly.

5. The combination with a vertical water tube boiler having a cylindrical shell com-y prising an outer metal casing which is lormed with av vertical slot at one side and at the other side with a vertical series ot' holes, ot' a superheater including a vertical row of horizontal tubes extending across said shell and having their ends at one side of the boiler passingithrough and snugly fitting in said holes, and plates bridging said slot and 'formed with holes snugly receiving the corresponding ends ol said tubes. said tubes being surrounded Within the casing by ribbed tube casings, and said' slot being wide enough to permit the passage ot the encaseril portions 'oit' the tube when said plates are removed.

6. The combinationvvith a vertical water tube boiler having a cylindrical shell comprising' an outer casing which is formed with a vert-ical slot at one side and at the other side with a. vertical Series ol holes, of angle bars reinforcing said casing at the Vedges yof said'slot, a super-heater comprisii'ig a vertical rowot' horizontal tubes extending across said shell and having their ends at one side ot' the boil-er passing through and snugly fitting in said holes, plates bridging said slotand removably .secured to said bars and formed with holes snugly receiving the corresponding ends of said tubes, said tubes rbeingA surrounded within the casing by ribbed tube casmgs and said slot being Wide enough rto permit the passage of the encased portions #ofthetube when said plates are removed.

Signed at New York city,V in the county of New York, and State oit New York, this 14th day of April, A. D. 1925.

WALTER FRANCIS KEENAN, Ja. 

